If you want to study Islam, you have to study the Sources of Islam.
There are only two sources of Islam: (1) The Quran and (2) The Traditions of
Prophet Muhammed (s.a.w.s.) which is known as Hadith.

Hadith is the interpretation of the Quran. There are many books of
Hadith. Sahih Bukhari and Sahih Muslim are the two most famous and authentic
books of Hadith. Here, you can download the softwares and pdf files of the
Sources of Islam in Arabic, Urdu, Hindi and English Languages. You can read
them in your mobile or tab or computer.